During sunrise and sunset sky appears red while during the day it appears blue.

During the day (daylight) the sky has a blue appearance because the Sun’s light (white light) is made up of rainbow of colors (red, orange, yellow, green, blue, indigo and violet)...

Solution: For an m×n chessboard there are 2m+2n−2 ways. Case I. There are two horizontally adjacent squares of the same color: 2m−2 ways. Case II. There are two vertically adjacent squares of the same color: 2n−2 ways. Case III. None of the...

(c) violet and blue lights get scattered more than lights of all other colours by the atmosphere

(b) Scattering of light

Hint— During sunrise and sunset the sun appears reddish whereas at noon the sun appears white. Explanation should be given in terms of atmospheric depth travelled by light. Colours are...

Because water molecules act as ligands and results in crystal Fleld splitting of d-orbitals of Cu2+ ion.

The fine particles in the atmosphere scatter light of shorter wavelength (blue color) more strongly than the light of longer wavelength (red color). Therefore, the sky appears blue from the surface...

(b) A cloudy day

(a) The apparent flattening (oval shape) of the sun at sunset and sunrise is due to refraction

(d) earth → sky  water → light  light → air  air →  water  sky → earth If someone is thirsty, then he would drink water. Now, water on that planet means light, so he would drink light.